Eric, aka Zeroepoch, the man who first rooted the 2nd generation Amazon Fire TV has released a rooting package for the new software update, version 5.0.4. Someone has already used the new package and confirmed that it worked to successfully root a 2nd-gen Fire TV running software version 5.0.4. A branch for 5.0.4 has been created on the GitLab repository for the new rooting files for those with the knowhow to follow the instructions. If you’ve already rooted your 2nd-gen Fire TV running 126.96.36.199, the safest bet is to unroot, update to 5.0.4, and then re-root. There is work being done to update an already rooted device, but it is not complete. If you’re currently on Fire TV software version 188.8.131.52 with updates blocked because you plan to root, it’s best to allow your device to update to 5.0.4 and then re-block updates.